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Series in Quantum Electronics
edited by
Henry Baltes, Peter Günter, Ursula Keller,
Fritz K. Kneubühl †, Walter Lukosz,
Hans Melchior, Markus W. Sigrist
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Vol. 60 Oliver Dominik Sieber, Scaling high-power ultrafast VECSELs
into the femtosecond regime 1st edition 2013. XXVIII, 158 pages, € 64,00. |
In this work,
novel achievements in the field of ultrafast vertical-external-cavity
surfaceemitting lasers (VECSELs) are discussed. These devices have the
potential to provide a cost-efficient and compact alternative to current
ultrafast laser sources for many fields. Many of the potential areas of
applications depend not only on short pulses, but also on a high pulse peak
power, i.e. a combination of femtosecond pulses and high average output power.
In this work,
the pulse duration of ultrafast VECSELs was scaled down to the femtosecond
regime and experimental results of mode-locked VECSELs operating in the
femtosecond regime will be presented. In order to advance into this regime, the
underlying principle of passive modelocking of VECSELs, especially the
influence of Group Delay Dispersion (GDD), was investigated in more detail.
Pulse
durations of a few 100 fs and output powers in the Watt range have not been
demonstrated so far, but would be an important next step in the development of
these lasers. For this reason, the influence of various parameters on the pulse
duration was investigated using numerical pulse formation simulations. The
simulations show in particular that the saturation fluence of the gain material
must be increased in order to attain shorter pulses with higher output power.
About the author:
Oliver D.
Sieber received his diploma in physics in 2009 from ETH
Zurich, Switzerland. He joined the Ultrafast Laser Physics group in the
Institute of Quantum Electronics at ETH Zurich in the same year. His research
interests focus on the development of ultrafast VECSELs and the numerical
modeling of the pulse formation of these lasers.
Keywords: VECSEL, semiconductor disk laser, ultrafast,
modelocking, numerical modeling
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